摘要
We investigate the dynamics of coherence for a central two-qubit system coupled to an XY spin chain with the Dzyaloshinsky–Moriya interaction. It is found that a sudden transition of coherence exists near the critical point in the weak-coupling case, and an oscillatory envelope appears in the strong-coupling case. In both cases the freezing phenomenon of coherence can be found.
We investigate the dynamics of coherence for a central two-qubit system coupled to an XY spin chain with the Dzyaloshinsky–Moriya interaction. It is found that a sudden transition of coherence exists near the critical point in the weak-coupling case, and an oscillatory envelope appears in the strong-coupling case. In both cases the freezing phenomenon of coherence can be found.
作者
Yang Yang
An-Min Wang
Lian-Zhen Cao
Jia-Qiang Zhao
Huai-Xin Lu
杨阳;王安民;曹连振;赵加强;逯怀新(Shandong Provincial Key Laboratory of Multi-Photon Entanglement and Manipulation,Department of Physics and Optoelectronic Engineering, Weifang University;Department of Modern Physics, University of Science and Technology of China)
基金
Supported by the National Natural Science Foundation of China under Grant No 11404246
the Shandong Provincial Natural Science Foundation under Grant No ZR2017MF040
